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    API5D drill pipe Mechanical properties of various steel grade geological drill pipes

    Drill pipe structure The drill pipe is made of seamless steel pipe with a wall thickness of 9~11mm. The pipe body and the joint of the drill pipe are composed of two parts. The pipe body and the joint are welded together by friction welding.

    There are three types of threaded drill pipe joints: internal flat (IF), regular (REG) and digital (NC).